Motor cycle



J. A. PETERS.

MOTOR CYCLE.

APPLICATION man JAN. 12, 1922.

Patefited June 20, 1922.

7 I I wmwvk (I14 Peif71$ JAMES ARTHUR PETERS, OF THE WHITE HOUSE, NEAR SCARBOROUGH, ENGLAND.

MOTOR CYCLE.

Specification of Letters Patent. Patgnted June 20, 1922,

Application filed January 12, 1922. Serial No. 528,679.

T 0 all w/wmz't may concern:

Be it known that I, JAMns ARTHUR PETERS, a British subject, residing at The White House, near Scarborough, in the county of Yorkshire, England, have invented certain new and useful Improvements in Motor Cycles, of which the following is a specification.

This invention comprises an improved motor-cycle frame of the kind wherein the frame proper (that is to say, excluding the front and rear wheel forks) is generally triangular. According to the invention, the upper approximately horizontal arm of the triangle is constituted by the fuel tank, and one of the inclined arms is constituted by the crank-case and one or more cylinders of the engine. The third side may be constituted by the crank-case and one or more engine cylinders, or by an oil or fuel pipe, or merely by a tube or strut.

The preferred form of the invention is illustrated in the accompanying drawing in which Fig. 1 shows a motor-cycle having a single-cylinder engine, and Fig. 2 a twincylinder engine, and Fig. 3 is a cross-section 32nd Fig. 4 a plan of the tank shown in Referring now to Fig. 1, the triangulated frame comprises the tank a, engine crankcase and cylinder 6, and fuel pipe 0, the pipe being rigid with the tank, and the engine united to the tank and pipe by pin-joints d. The tank shell may be of sheet steel or other suitable material. Fig. 2 shows an alternative form where the third arm of the triangle is constituted by a second cylinder 6 In either case, the cylinder 6 or cylinders b and b may be replaced by twin cylinders arranged in parallel if desired.

The shell is provided with a suitably-situ ated and inclined tube 6, Fig. 3, for the housing of the steering-head, the tube being welded or otherwise suitably attached to the shell. One or more additional tubes may be similarly fitted if desired for the l assa 'e therethrou h of controls as or electric leads for lighting, or other accessories. In the form shown, the tank is provided with a separate compartment 7 intended for lubricating oil, the said compartment having the general form of an inverted truncated pyramid, and its smaller end projecting below the tank and being provided with a fitting for attachment of the engine, thus providing a strong anchorage to support the frame stresses, and to triangulate theinternal structure of the tankwithin' the central zone.

The third arm of the frame is, in the form shown in Figs. 1, 3 and 4, constituted by the petrol supply-pipe c terminating in a fitting for attachment to the engine, and provided with a lead 9 extending to the carburettor (not shown). The tube a may be welded or otherwise suitably secured to the tank, and it may be formed as a separate compartment in cases where a difl'eren't fuel is desired to be employed for starting up, in which case the main fuel tank will of course be provided with a separate lead which may connect with the lead 9 by means of a three-way cook. The tube 0 is, as illustrated in Fig. 3, open to the interior of the tank and serves as a structural frame element.

It will be understood that the tank may if desired, be fitted with additional compartments which may open outwardly and serve for the reception of tools, batteries, clock, speedometer or the like; and a lamp and/ or horn may be formed with or integrally mounted in the tank shell, though not necessarily serving as structural elements of the frame.

The form shown in Fig. 2 wherein the third arm of the frame is constituted by a second engine-cylinder, requires no further description in view of, the above, except to remark that a separate fuel. lead will be required in replacementof the tube 0 and lead 9 of Fig. 1.

Iclaim 1. In a motor-cycle frame, the combination of a fuel tank serving as one structural element of the frame and a petrol supply pipe passing through said tank but having opening to the interior thereof and serving as a second structural element of the frame.

2. In a motor cycle frame, a triangulated frame structure made up of a fuel tank through which the head of the frame ex,

tends, said fuel tank forming one element of the triangulated frame, the engine structure and crank case forming a second eleand a third element by the fuel tank to which the fuel tube is secured at one end, the opposite end of the fuel tank providing a housing for the steering head. K I

4. A motor cycle frame, comprising three elements arranged in triangulated form,

whereof one is constituted by abuilt-up fuel tank and a second by the engine crank case and a cylinder, the cylinder headbeing directly attached at one end to the'underside 10 and intermediate the ends of the fuel tank;

In testimony whereof I afiix my signature.

JAMES ARTHUR PETERS. 

